Queens Series Release Notes

Enhance the key manager to handle requests containing the special (all
zeros) managed object ID associated with Cinder’s and Nova’s legacy
ConfKeyManager. The purpose of this feature is to help users migrate from
the ConfKeyManager to a modern key manager such as Barbican. The feature
works by ensuring the ConfKeyManager’s all-zeros key ID continues to
function when Barbican or Vault is the key manager.